Gas burner structure



G. H. IRWIN GAS BURNER\ STRUCTURE Filed Aug July 14, 1931.

ll, 1928 2 Sheets-Sheet l 'IIIIII'IIIIIIIIIIIIIII rlmvlll "IIIIIIII'IIIIII Immim; J M B 9 G. H. IRWIN GAS BURNER STRUCTURE 2 Sheets- Sh eet2 Fild Aug.

Patented July 14, 1931 barren stares GEORGE I-LIRWIN, OF CHICAGO,ILLINOIS GAS BURNER STRUCTURE Application filed August 11, 1928. SerialNo. 298,555.

My invention relates to improved burner structure adapted particularlyfor use with steam or hot water boilers for delivering completecombustion mixture of properly proportioned gas and air to a closed firebox Without further admixture of air, and improved application andarangement of an ignition element such as a spark plug for igniting thecombustion mixture.

An important object is to provide a simple burner structure which Willreceive the combustion mixture under pressure and speed and Willdischarge it in a uniform stream into the furnace.

Another object is to provide a burner having an annular nozzle chamberWith a circu lar concentric row of mixture outlets, together With aspark plug located axially Within the outer end of the space surroundedby the nozzle chamber so as to be away from the hot end of the nozzleand subjected to the cooling influence of the cool combustion mixturetravelling through the chamber, whereby the plug Will at all times beprotected from the heat.

Another object is to keep the spark plug out of the direct path of thecombustion mixture and to provide for small pilot jets into the sparkingfield of the plug for igniting the main stream of mixture dischargedfrom the nozzle chamber into the furnace.

Referring to the drawings Figure 1 shows part of a. boiler in diametralsection and my improved burner applied thereto.

Figure 2 is a front elevation of the boiler and burner.

Figure 3 is an enlarged section on plane 33, Figure 2.

Figure 4 is an enlarged section on plane 4-4, Fig. 2, and

Figure 5 is an elevation of the outlet end of the burner.

The body or nozzle 1 of the burner structure is annular and encloses theannular chamber 2. A duct 3 connects with the outer end of the body tosupply combustion mixture to the chamber 2 and the inner end Wall 4 ofthe body has the outlet holes 5 for di- 6O reeting the mixture into afire box or other chamber 2' to be discharged through the space Where itis to be burned. Within the central or axial space 6 of the annular bodyI locate an ignition element such as a spark plug 7 for igniting thecombustion mixture discharged through the holes 5. For sup- .55 portingthe spark plug I provide a Web 8 at the outer end of the space 6, WhichWeb is axially threaded so that the plug can be readily screwed thereinfrom the outside of. the burner; This arrangement will keep the plugsufficiently remote from the hot Wall 4 and Within the cooler zone ofthe burner so that the plug will be kept comparatively cool. To insureignition of the mixture discharged through the holes 5, one or moresmall radial holes 9 may be provided for dir eting pilot jets toward theplug spark points. The flame from these jets Will be small and ofcomparatively little heat but will serve to. ignite the main body of thecombustion mixture discharged through the holes 5.

'My improved burner can be used with great efficiency on steam or notWater boilers for generating steamer heating Water for industrial ordomestic purposes, particularly Where complete combustion mixture ofprep erly proportioned air and natural or manufactured gas is to bedelivered to a closed fire box Without further admixture of air. 7

I have shown the burner applied to a steam boiler B Whose fire box 10 isentirely closed to combustion element inlets except for the inletopening-11, into Which the burner nozzle of body extends, and thisopening is sealed when the burner is applied. The burner has the flange12 by means of Which it is secured to the reinforcing frame 13 appliedto the boiler at the inlet 11, a gasket 14 being interposed between theflange and frame to make the connection gas and air tight. The frame 12has theshelf 15 for supporting a motor M and fan F driven thereby. Thefan receives and thoroughly mixes air and gas in proper proportion andthe completed combustion mixture is delivered from the fan through thefitting 16 to the burner, inlet duct?) and from there to the burnerholes 5 into the closed fire box for combustion therein.

The burner wall 4 becomes heated by the reflex actionof the heat in thefirebox so that the combustion mixture directly adjacent to the wall ispreheated before flowing through the holes 5 and becoming ignited andthe combustion efiiciency is thus increased. However, the chamber zonesurrounding the spark plug is kept comparatively Very cool by thecool-mixture:forced into and through the chamber by the fan pressure sothat the spark plug cannot become overheated. Byplacing the plug at theouter end of the pocket of space 6, it is away from the direct action ofthe main flame and the heat in the furnace. Practical tests havedemonstratedthat with the completed mixture of air and gas flowing underpressure and at a high rate of speed through the burner, and with atemperature of l800 to 2000" Fahrenheit iii the fire box, the spark plugcan be kept at a temperature not in excess of 300. 'By placing .thespark plug well within the recess or passage 6, it will be out of thepath of any dust, dirt or foreign matter which might beblown through theburner with the combustion mixture and which might foul the plug. 7

It is evident that a numberof burners may be applied to a furnace andthe combustion mixture-"supplied from the same fan, and tlie spark plugsoperated from the same ignition circuit.

The sparking is preferably continuous from the high voltage secondary ofa transformer connected -directly with the ordinary 110 volt or 220 Volthouse circuit.

I do notdesire to be limited to the exact structure and: operation shownas vmodifications are possible without departing. from 'the scope of theinvention.

\ ranged in a row concentric with said body,

bustion mixture inlet for the outer end of said chamber, there beingcombustion mixture discharge outlets from the inner end of said chamberarranged in a row concentric with said chamber and said space, a wallenclosing the outer end of saidspace, and a spark plug extending throughsaid wall to project into said space with its terminals entirely Withinthe plane of said discharge outlets. V In witness whereof, I havehereunto subscribed name this 9th day of August,

GEORGE H. IRWIN.

a spark plug located axially within-the outer end of the central spacesurrounded by said body, and radial gas outlets fromsa d annular passagefor ldirectingp-ilot flames into said central space bet-weenthe sparkingend of the plug and said main outlets. 2. A gas burner structurecomprising. an annular body enclosing an :annular .pas-

sage, a combustion mixture inlet to said passage, combustion mixtureimain outlets through the inner wall of said body arranged in a rowaroundthe-bodyaxis, a wall across the touter end of the space surroundedby said annular-body, a spark plug seated in-isaidiwall and projectingaxially

